diff options
| -rw-r--r-- | WasmAudio/main.c | 110 |
1 files changed, 31 insertions, 79 deletions
diff --git a/WasmAudio/main.c b/WasmAudio/main.c index 38f5e1a..2ab9449 100644 --- a/WasmAudio/main.c +++ b/WasmAudio/main.c @@ -61,18 +61,15 @@ static SDL_Renderer *renderer = NULL; static SDL_AudioDeviceID recordingDeviceId = 0; static SDL_AudioDeviceID playbackDeviceId = 0; int audio_buf_position=0; -//uint8_t *audio_play_buffer=NULL; int current_state=0; int audio_rec_buffer_size=-1; int audio_rec_buffer_max_size=-1; -//int audio_play_buffer_size=-1; -//int audio_play_buffer_max_size=-1; static uint8_t audio_rec_buffer_[BUFSIZE]; const int process_buf_size = BUFSIZE4; -static double process_buf[process_buf_size*4]; -static double process_buf2[process_buf_size*4]; +static double process_buf[process_buf_size+100]; +static double process_buf2[process_buf_size+100]; uint8_t *audio_rec_buffer=NULL; @@ -111,56 +108,42 @@ enum RecordingState void convert_double_to_f32() { int i=0; - printf("float sizeof=%lu\n",sizeof(float)); - printf("double sizeof=%lu\n",sizeof(double)); for (i=0;i<BUFSIZE2;i+=4) { double d = process_buf[i/4]; + if (i/4 > BUFSIZE4) { + printf("Buffer overflow convert_double_to_f32"); + exit(1); + } float f = d; - //printf("%f ",f); - //f = f*2147483647.0; int32_t *i32_ = &f,i32=*i32_; - //printf("%d %f\n",i32,f); - - //audio_rec_buffer[i+0] = ((int)i32>> 24)&0xff; - //audio_rec_buffer[i+1] = ((int)i32>> 16)&0xff; - //audio_rec_buffer[i+2] = ((int)i32>> 8)&0xff; - //audio_rec_buffer[i+3] = ((int)i32&0xff); - audio_rec_buffer[i+3] = ((int)i32>> 24)&0xff; audio_rec_buffer[i+2] = ((int)i32>> 16)&0xff; audio_rec_buffer[i+1] = ((int)i32>> 8)&0xff; audio_rec_buffer[i+0] = ((int)i32&0xff); - - //audio_rec_buffer[i+0] = ((int)f>> 24)&0xff; - //audio_rec_buffer[i+1] = ((int)f>> 16)&0xff; - //audio_rec_buffer[i+2] = ((int)f>> 8)&0xff; - //audio_rec_buffer[i+3] = ((int)f&0xff); - - //memcpy(&f,&audio_rec_buffer[i],4); + } //printf("\n"); - for (i=0;i<100;i+=4) { - fprintf(f_2, "%d %02x %02x %02x %02x\n", i/4,audio_rec_buffer[i],audio_rec_buffer[i+1],audio_rec_buffer[i+2],audio_rec_buffer[i+3]); - } } void convert_f32_to_double() { int i=0; - for (i=0;i<100;i+=4) { - fprintf(f_1, "%d %02x %02x %02x %02x\n", i/4,audio_rec_buffer[i],audio_rec_buffer[i+1],audio_rec_buffer[i+2],audio_rec_buffer[i+3]); - } for (i=0;i<BUFSIZE2;i+=4) { int32_t i32 = ((audio_rec_buffer[i+3] << 24) | (audio_rec_buffer[i+2] << 16) | (audio_rec_buffer[i+1] << 8) | (audio_rec_buffer[i+0]) ); float *ff = &i32; //double d = f; - process_buf[i/4] = *ff; - printf("%f %f\n",ff,process_buf[i/4]); + if ((i/4)<BUFSIZE4) { + process_buf[i/4] = *ff; + } else { + printf("Buffer overflow convert_f32_to_double\n"); + exit(0); + } + //printf("%f %f\n",ff,process_buf[i/4]); } } @@ -178,29 +161,31 @@ void convert_dobule_up() { } } -void save_to_matlab() { +void save_to_matlab(char *name) { int i; FILE *f=NULL; - - f = fopen("B.mat","w+"); + char namebuf[256]; + snprintf(namebuf,sizeof(namebuf),"%s.mat",name); + f = fopen(namebuf,"w+"); fprintf(f,"# Created by me\n"); - fprintf(f,"# name: B\n"); + fprintf(f,"# name: %s\n",name); fprintf(f,"# type: matrix\n"); fprintf(f,"# rows: 1\n"); - fprintf(f,"# columns: %d\n",BUFSIZE16); + int dumpSize=BUFSIZE16; + fprintf(f,"# columns: %d\n",dumpSize); #if 1 - for (i=0;i<BUFSIZE16;i++) { + for (i=0;i<dumpSize;i++) { float f1=2.0f; fprintf(f," %.4f",process_buf[i]); } #endif -#if 1 - for (i=0;i<BUFSIZE16;i+=4) { +#if 0 + for (i=0;i<dumpSize;i+=4) { int32_t i32 = (float)((audio_rec_buffer[i+0] << 24) | (audio_rec_buffer[i+1] << 16) | (audio_rec_buffer[i+2] << 8) | (audio_rec_buffer[i+3]) ); float ff=i32; - //fprintf(f," %.3f",ff); + fprintf(f," %.3f",ff); //printf(" %.3f",ff); } @@ -297,25 +282,17 @@ int main_tick() { //process recorderd buffer with low pass filter if (current_state == RECORDED) { convert_f32_to_double(); - save_to_matlab(); + save_to_matlab("B1"); //simple volume raise #if 0 convert_dobule_up(); #endif //fir filter apply #if 1 - printf("Apply low pass filter\n"); - + fir_filter(&fir_lp, process_buf, process_buf_size, process_buf2, process_buf_size); - //memcpy(process_buf2,process_buf,process_buf_size*sizeof(double)); memcpy(process_buf,process_buf2,process_buf_size*sizeof(double)); - //for (i=0;i<100;i++) { - //process_buf[i] = process_buf2[i]; - // printf("[%d]=%f\n",i,process_buf[i]); - //} - - //memmove(process_buf,process_buf2,process_buf_size*sizeof(double)); - + save_to_matlab("B2"); #endif convert_double_to_f32(); } @@ -444,7 +421,7 @@ int main(int argc, const char * argv[]) { double h[N],w[N]; int filter_N=60; int filter_FS_hz=48000; - int filter_FC_hz=20000; + int filter_FC_hz=1000; double filter_FC=1.0*filter_FC_hz/filter_FS_hz; @@ -460,8 +437,8 @@ int main(int argc, const char * argv[]) { fir_init(&fir_lp, filter_N); firw_init(&firw_lp, filter_N); - //fir_sinc_lp(&fir_lp, filter_FC); - fir_sinc_hp(&fir_lp, filter_FC); + fir_sinc_lp(&fir_lp, filter_FC); + //fir_sinc_hp(&fir_lp, filter_FC); firw_blackman(&firw_lp); //firw_rect(&firw_lp); fir_convolute(&fir_lp, &firw_lp); @@ -556,31 +533,6 @@ int main(int argc, const char * argv[]) { current_state = STOPPED; printf("State: STOPED\n"); - - - - - //SDL_PauseAudioDevice(recordingDeviceId,0); - //!SDL_LockAudioDevice(recordingDeviceId); - //SDL_PauseAudioDevice(recordingDeviceId, 0); - //SDL_PauseAudio(0); - //SDL_Delay(4000); - //!SDL_UnlockAudioDevice(recordingDeviceId); - //!SDL_CloseAudio(); - //SDL_CloseAudioDevice(recordingDeviceId); - /* - if (SDL_OpenAudio(&audio_want, &audio_have) < 0) { - SDL_Log("Failed to open audio: %s", SDL_GetError()); - } else { - if (audio_have.format != audio_want.format) { - SDL_Log("We didn't get Float32 audio format."); - } - SDL_PauseAudio(0); - SDL_Delay(5000); - SDL_CloseAudio(); - } - */ - f_1 = fopen("pre.txt","w+"); f_2 = fopen("post.txt","w+"); |